ATARA BIOTHERAPEUTICS INC

CUSIP: 046513107 Class: Common Stock

OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AM's Holding History (CIK: 0001132716)

Note: Option positions (PUT/CALL) are excluded.

Q3 2015
Shares 11,676 Value ($000) $367,000 Avg Close — Range —